| commit | a5ec6ae161d72f01411169a938fa5f8baea16e8f | [log] [tgz] |
|---|---|---|
| author | Jann Horn <jannh@google.com> | Mon Dec 18 20:11:58 2017 -0800 |
| committer | Daniel Borkmann <daniel@iogearbox.net> | Thu Dec 21 02:15:41 2017 +0100 |
| tree | ac35208d260c569dff7eb526c5db93536e07b0f5 | |
| parent | ea25f914dc164c8d56b36147ecc86bc65f83c469 [diff] |
bpf: force strict alignment checks for stack pointers
Force strict alignment checks for stack pointers because the tracking of
stack spills relies on it; unaligned stack accesses can lead to corruption
of spilled registers, which is exploitable.
Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>